642644606360 has 32 divisors (see below), whose sum is σ = 1495810724400. Its totient is φ = 248193778560.

The previous prime is 642644606353. The next prime is 642644606407. The reversal of 642644606360 is 63606446246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277000826 + ... + 277003145.

Almost surely, 2^642644606360 is an apocalyptic number.

It is an amenable number.

642644606360 is an abundant number, since it is smaller than the sum of its proper divisors (853166118040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642644606360 is a wasteful number, since it uses less digits than its factorization.

642644606360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554004011 (or 554004007 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 47.

The spelling of 642644606360 in words is "six hundred forty-two billion, six hundred forty-four million, six hundred six thousand, three hundred sixty".